In a weak sense, the authors are commodified no matter what, just as any other worker is. As a proletarian, he must sell his labour-time (by the hour, week, month, year...) on the market to the bourgeoisie, his labour-time being the only thing he can sell, in order to make enough to survive.

The rest of the time when they are not at work, the authors 'recharge' in order to ready for more work and to keep motivation for working. In this way, the worker's entire life during the course of employment 'belongs' to the employer; in fact arguably the time when the worker is most valuable to the employer is when he is maintainig himself, just as the employer must maintain a machine from wear and tear, the worker is able to maintain himself from wear and tear and the employer doesn't have to pay a dime more for it.